1022 PATELLA. 



Shell about an inch and a half long, and rather more than half 

 as broad, of a brownish colour, with the ribs white, and 

 their interstices transversely striated ; the summit is obtuse, 

 and marked with two white eyes. This species appears 

 to me to rest almost entirely on the authority of Rum- 

 phius, from whose figure all the others have probably been 

 copied. 



PLICATA. 15. Shell angulated, with undulated 

 blunt much elevated ribs, and transversely 

 wrinkled ; summit obtuse. 



Patella plicata. Born Mus. p. 417. t. 18. f. 1. Mus. Lesk- 



eannm, p. 301. 

 Patella plicaria. Gmelin, p. 3708. 

 Patella, No. 84. Schroeter Einl. ii. p. 476. 

 Patella, No. 43. Schreibers Conch, i. p. 349. 



Inhabits 



Born says, the length of this shell is two inches and a half, and 

 the breadth two inches and one line, and that the colour is 

 white spotted with brown, but the figure is coloured of a 

 pale brownish white without any spots ; it has about thirty 

 obtuse ribs, which form strong teeth on the margin. The 

 synonyms which Born has added to his description are very 

 erroneous, and his having stated that the species inhabits the 

 Straights of Magellan, arose from his having considered it to 

 be the same as D'Avila, t. 3. f. D, which is P.ferruginea. 

 Schreibers, for P. plicaria of Gmelin, has only quoted 

 Knorr, iii. t. 30. f. 1 , and erroneously arranged Born's shell 

 separately. P. plicata of Gmelin is taken from Meuschen 

 Naturf. t. 2. f. 12. and is a very uncertain species. 



MONOPis. 16. Shell depressed, with about eleven 

 strong carinated and intermediate smaller 

 ribs. 



Patella monopis. Gmelin, p. 3707. Schreibers Conch, i. 



p. 347.? 

 Patella, No. 30. Schroeter Einl. ii. p. 453. 

 Martini, i. p. 126. t. 9- f. 80. 



Inhabits the coasts of the West India Islands. Gmelin. 



Shell about two inches long, and nearly equally broad, thick, 

 of a whitish brown colour, more or less streaked with dark 

 chestnut, and the latter sometimes prevails ; some of the 

 ribs project much further than others, which gives the base 

 a very irregular form, and the inside is white. Gmelin has 



